from __future__ import print_function
import ompdModule
from ompd_handles import ompd_thread, ompd_task, ompd_parallel
import gdb
import sys
import traceback
from enum import Enum

class ompd_scope(Enum):
	ompd_scope_global = 1
	ompd_scope_address_space = 2
	ompd_scope_thread = 3
	ompd_scope_parallel = 4
	ompd_scope_implicit_task = 5
	ompd_scope_task = 6

class ompd_address_space(object):
	
	def __init__(self):
		"""Initializes an ompd_address_space object by calling ompd_initialize
		in ompdModule.c
		"""
		self.addr_space = ompdModule.call_ompd_initialize()
		# maps thread_num (thread id given by gdb) to ompd_thread object with thread handle
		self.threads = {}
		self.states = None
		self.icv_map = None
		self.ompd_tool_test_bp = None
		self.scope_map = {1:'global', 2:'address_space', 3:'thread', 4:'parallel', 5:'implicit_task', 6:'task'}
		self.sched_map = {1:'static', 2:'dynamic', 3:'guided', 4:'auto'}
		gdb.events.stop.connect(self.handle_stop_event)
		self.new_thread_breakpoint = gdb.Breakpoint("ompd_bp_thread_begin", internal=True)
		tool_break_symbol = gdb.lookup_global_symbol("ompd_tool_break")
		if (tool_break_symbol is not None):
			self.ompd_tool_test_bp = gdb.Breakpoint("ompd_tool_break", internal=True)
	
	def handle_stop_event(self, event):
		"""Sets a breakpoint at different events, e.g. when a new OpenMP 
		thread is created.
		"""
		if (isinstance(event, gdb.BreakpointEvent)):
			# check if breakpoint has already been hit
			if (self.new_thread_breakpoint in event.breakpoints):
				self.add_thread()
				gdb.execute('continue')
				return
			elif (self.ompd_tool_test_bp is not None and self.ompd_tool_test_bp in event.breakpoints):
				try:
					self.compare_ompt_data()
					gdb.execute('continue')
				except():
					traceback.print_exc()
		elif (isinstance(event, gdb.SignalEvent)):
			# TODO: what do we need to do on SIGNALS?
			pass
		else:
			# TODO: probably not possible?
			pass
	
	def get_icv_map(self):
		"""Fills ICV map.
		"""
		self.icv_map = {}
		current = 0
		more = 1
		while more > 0:
			tup = ompdModule.call_ompd_enumerate_icvs(self.addr_space, current)
			(current, next_icv, next_scope, more) = tup
			self.icv_map[next_icv] = (current, next_scope, self.scope_map[next_scope])
		print('Initialized ICV map successfully for checking OMP API values.')
		
	def compare_ompt_data(self):
		"""Compares OMPT tool data about parallel region to data returned by OMPD functions.
		"""
		# make sure all threads and states are set
		self.list_threads(False)
		
		thread_id = gdb.selected_thread().ptid[1]
		curr_thread = self.get_curr_thread()
		
		# check if current thread is LWP thread; return if "ompd_rc_unavailable"
		thread_handle = ompdModule.get_thread_handle(thread_id, self.addr_space)
		if thread_handle == -1:
			print("Skipping OMPT-OMPD checks for non-LWP thread.")
			return
		
		print('Comparing OMPT data to OMPD data...')
		field_names = [i.name for i in gdb.parse_and_eval('thread_data').type.fields()]
		thread_data = gdb.parse_and_eval('thread_data')
		
		if self.icv_map is None:
			self.get_icv_map()
		
		# compare state values
		if 'ompt_state' in field_names:
			if self.states is None:
				self.enumerate_states()
			ompt_state = str(thread_data['ompt_state'])
			ompd_state = str(self.states[curr_thread.get_state()[0]])
			if ompt_state != ompd_state:
				print('OMPT-OMPD mismatch: ompt_state (%s) does not match OMPD state (%s)!' % (ompt_state, ompd_state))
		
		# compare wait_id values
		if 'ompt_wait_id' in field_names:
			ompt_wait_id = thread_data['ompt_wait_id']
			ompd_wait_id = curr_thread.get_state()[1]
			if ompt_wait_id != ompd_wait_id:
				print('OMPT-OMPD mismatch: ompt_wait_id (%d) does not match OMPD wait id (%d)!' % (ompt_wait_id, ompd_wait_id))
		
		# compare thread id
		if 'omp_thread_num' in field_names and 'thread-num-var' in self.icv_map:
			ompt_thread_num = thread_data['omp_thread_num']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.thread_handle, self.icv_map['thread-num-var'][1], self.icv_map['thread-num-var'][0])
			if ompt_thread_num != icv_value:
				print('OMPT-OMPD mismatch: omp_thread_num (%d) does not match OMPD thread num according to ICVs (%d)!' % (ompt_thread_num, icv_value))
		
		# compare thread data
		if 'ompt_thread_data' in field_names:
			ompt_thread_data = thread_data['ompt_thread_data'].dereference()['value']
			ompd_value = ompdModule.call_ompd_get_tool_data(3, curr_thread.thread_handle)[0]
			if ompt_thread_data != ompd_value:
				print('OMPT-OMPD mismatch: value of ompt_thread_data (%d) does not match that of OMPD data union (%d)!' % (ompt_thread_data, ompd_value))
		
		# compare number of threads
		if 'omp_num_threads' in field_names and 'team-size-var' in self.icv_map:
			ompt_num_threads = thread_data['omp_num_threads']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.get_current_parallel_handle(), self.icv_map['team-size-var'][1], self.icv_map['team-size-var'][0])
			if ompt_num_threads != icv_value:
				print('OMPT-OMPD mismatch: omp_num_threads (%d) does not match OMPD num threads according to ICVs (%d)!' % (ompt_num_threads, icv_value))
		
		# compare omp level
		if 'omp_level' in field_names and 'levels-var' in self.icv_map:
			ompt_levels = thread_data['omp_level']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.get_current_parallel_handle(), self.icv_map['levels-var'][1], self.icv_map['levels-var'][0])
			if ompt_levels != icv_value:
				print('OMPT-OMPD mismatch: omp_level (%d) does not match OMPD levels according to ICVs (%d)!' % (ompt_levels, icv_value))
		
		# compare active level
		if 'omp_active_level' in field_names and 'active-levels-var' in self.icv_map:
			ompt_active_levels = thread_data['omp_active_level']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.get_current_parallel_handle(), self.icv_map['active-levels-var'][1], self.icv_map['active-levels-var'][0])
			if ompt_active_levels != icv_value:
				print('OMPT-OMPD mismatch: active levels (%d) do not match active levels according to ICVs (%d)!' % (ompt_active_levels, icv_value))
		
		# compare parallel data
		if 'ompt_parallel_data' in field_names:
			ompt_parallel_data = thread_data['ompt_parallel_data'].dereference()['value']
			current_parallel_handle = curr_thread.get_current_parallel_handle()
			ompd_value = ompdModule.call_ompd_get_tool_data(4, current_parallel_handle)[0]
			if ompt_parallel_data != ompd_value:
				print('OMPT-OMPD mismatch: value of ompt_parallel_data (%d) does not match that of OMPD data union (%d)!' % (ompt_parallel_data, ompd_value))
		
		# compare max threads
		if 'omp_max_threads' in field_names and 'nthreads-var' in self.icv_map:
			ompt_max_threads = thread_data['omp_max_threads']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.thread_handle, self.icv_map['nthreads-var'][1], self.icv_map['nthreads-var'][0])
			if icv_value is None:
				icv_string = ompdModule.call_ompd_get_icv_string_from_scope(curr_thread.thread_handle, self.icv_map['nthreads-var'][1], self.icv_map['nthreads-var'][0])
				if icv_string is None:
					print('OMPT-OMPD mismatch: omp_max_threads (%d) does not match OMPD thread limit according to ICVs (None Object)' % (ompt_max_threads))
				else:
					if ompt_max_threads != int(icv_string.split(',')[0]):
						print('OMPT-OMPD mismatch: omp_max_threads (%d) does not match OMPD thread limit according to ICVs (%d)!' % (ompt_max_threads, int(icv_string.split(',')[0])))
			else:
				if ompt_max_threads != icv_value:
					print('OMPT-OMPD mismatch: omp_max_threads (%d) does not match OMPD thread limit according to ICVs (%d)!' % (ompt_max_threads, icv_value))
		
		# compare omp_parallel
		# NOTE: omp_parallel = true if active-levels-var > 0
		if 'omp_parallel' in field_names:
			ompt_parallel = thread_data['omp_parallel']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.get_current_parallel_handle(), self.icv_map['active-levels-var'][1], self.icv_map['active-levels-var'][0])
			if ompt_parallel == 1 and icv_value <= 0 or ompt_parallel == 0 and icv_value > 0:
				print('OMPT-OMPD mismatch: ompt_parallel (%d) does not match OMPD parallel according to ICVs (%d)!' % (ompt_parallel, icv_value))
		
		# compare omp_final
		if 'omp_final' in field_names and 'final-task-var' in self.icv_map:
			ompt_final = thread_data['omp_final']
			current_task_handle = curr_thread.get_current_task_handle()
			icv_value = ompdModule.call_ompd_get_icv_from_scope(current_task_handle, self.icv_map['final-task-var'][1], self.icv_map['final-task-var'][0])
			if icv_value != ompt_final:
				print('OMPT-OMPD mismatch: omp_final (%d) does not match OMPD final according to ICVs (%d)!' % (ompt_final, icv_value))
		
		# compare omp_dynamic
		if 'omp_dynamic' in field_names and 'dyn-var' in self.icv_map:
			ompt_dynamic = thread_data['omp_dynamic']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.thread_handle, self.icv_map['dyn-var'][1], self.icv_map['dyn-var'][0])
			if icv_value != ompt_dynamic:
				print('OMPT-OMPD mismatch: omp_dynamic (%d) does not match OMPD dynamic according to ICVs (%d)!' % (ompt_dynamic, icv_value))
		
		# compare omp_max_active_levels
		if 'omp_max_active_levels' in field_names and 'max-active-levels-var' in self.icv_map:
			ompt_max_active_levels = thread_data['omp_max_active_levels']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.get_current_task_handle(), self.icv_map['max-active-levels-var'][1], self.icv_map['max-active-levels-var'][0])
			if ompt_max_active_levels != icv_value:
				print('OMPT-OMPD mismatch: omp_max_active_levels (%d) does not match OMPD max active levels (%d)!' % (ompt_max_active_levels, icv_value))
		
                # compare omp_kind: TODO: Add the test for monotonic/nonmonotonic modifier
		if 'omp_kind' in field_names and 'run-sched-var' in self.icv_map:
			ompt_sched_kind = thread_data['omp_kind']
			icv_value = ompdModule.call_ompd_get_icv_string_from_scope(curr_thread.get_current_task_handle(), self.icv_map['run-sched-var'][1], self.icv_map['run-sched-var'][0])
			ompd_sched_kind = icv_value.split(',')[0]
			if self.sched_map.get(int(ompt_sched_kind)) != ompd_sched_kind:
				print('OMPT-OMPD mismatch: omp_kind kind (%s) does not match OMPD schedule kind according to ICVs (%s)!' % (self.sched_map.get(int(ompt_sched_kind)), ompd_sched_kind))
		
		# compare omp_modifier
		if 'omp_modifier' in field_names and 'run-sched-var' in self.icv_map:
			ompt_sched_mod = thread_data['omp_modifier']
			icv_value = ompdModule.call_ompd_get_icv_string_from_scope(curr_thread.get_current_task_handle(), self.icv_map['run-sched-var'][1], self.icv_map['run-sched-var'][0])
			token = icv_value.split(',')[1]
			if token is not None:
				ompd_sched_mod = int(token)
			else:
				ompd_sched_mod = 0
			if ompt_sched_mod != ompd_sched_mod:
				print('OMPT-OMPD mismatch: omp_kind modifier does not match OMPD schedule modifier according to ICVs!')
			
		# compare omp_proc_bind
		if 'omp_proc_bind' in field_names and 'bind-var' in self.icv_map:
			ompt_proc_bind = thread_data['omp_proc_bind']
			icv_value = ompdModule.call_ompd_get_icv_from_scope(curr_thread.get_current_task_handle(), self.icv_map['bind-var'][1], self.icv_map['bind-var'][0])
			if icv_value is None:
				icv_string = ompdModule.call_ompd_get_icv_string_from_scope(curr_thread.get_current_task_handle(), self.icv_map['bind-var'][1], self.icv_map['bind-var'][0])
				if icv_string is None:
					print('OMPT-OMPD mismatch: omp_proc_bind (%d) does not match OMPD proc bind according to ICVs (None Object)' % (ompt_proc_bind))
				else:
					if ompt_proc_bind != int(icv_string.split(',')[0]):
						print('OMPT-OMPD mismatch: omp_proc_bind (%d) does not match OMPD proc bind according to ICVs (%d)!' % (ompt_proc_bind, int(icv_string.split(',')[0])))
			else:
				if ompt_proc_bind != icv_value:
					print('OMPT-OMPD mismatch: omp_proc_bind (%d) does not match OMPD proc bind according to ICVs (%d)!' % (ompt_proc_bind, icv_value))
		
		# compare enter and exit frames
		if 'ompt_frame_list' in field_names:
			ompt_task_frame_dict = thread_data['ompt_frame_list'].dereference()
			ompt_task_frames = (int(ompt_task_frame_dict['enter_frame'].cast(gdb.lookup_type('long'))), int(ompt_task_frame_dict['exit_frame'].cast(gdb.lookup_type('long'))))
			current_task = curr_thread.get_current_task()
			ompd_task_frames = current_task.get_task_frame()
			if ompt_task_frames != ompd_task_frames:
				print('OMPT-OMPD mismatch: ompt_task_frames (%s) do not match OMPD task frames (%s)!' % (ompt_task_frames, ompd_task_frames))
		
		# compare task data
		if 'ompt_task_data' in field_names:
			ompt_task_data = thread_data['ompt_task_data'].dereference()['value']
			current_task_handle = curr_thread.get_current_task_handle()
			ompd_value = ompdModule.call_ompd_get_tool_data(6, current_task_handle)[0]
			if ompt_task_data != ompd_value:
				print('OMPT-OMPD mismatch: value of ompt_task_data (%d) does not match that of OMPD data union (%d)!' % (ompt_task_data, ompd_value))
	
	def save_thread_object(self, thread_num, thread_id, addr_space):
		"""Saves thread object for thread_num inside threads dictionary.
		"""
		thread_handle = ompdModule.get_thread_handle(thread_id, addr_space)
		self.threads[int(thread_num)] = ompd_thread(thread_handle)
	
	def get_thread(self, thread_num):
		""" Get thread object from map.
		"""
		return self.threads[int(thread_num)]
	
	def get_curr_thread(self):
		""" Get current thread object from map or add new one to map, if missing.
		"""
		thread_num = int(gdb.selected_thread().num)
		if thread_num not in self.threads:
			self.add_thread()
		return self.threads[thread_num]
	
	def add_thread(self):
		"""Add currently selected (*) thread to dictionary threads.
		"""
		inf_thread = gdb.selected_thread()
		try:
			self.save_thread_object(inf_thread.num, inf_thread.ptid[1], self.addr_space)
		except:
			traceback.print_exc()
	
	def list_threads(self, verbose):
		"""Prints OpenMP threads only that are being tracking inside the "threads" dictionary.
		See handle_stop_event and add_thread.
		"""
		list_tids = []
		curr_inferior = gdb.selected_inferior()
		
		for inf_thread in curr_inferior.threads():
			list_tids.append((inf_thread.num, inf_thread.ptid))
		if verbose:
			if self.states is None:
				self.enumerate_states()
			for (thread_num, thread_ptid) in sorted(list_tids):
				if thread_num in self.threads:
					try:
						print('Thread %i (%i) is an OpenMP thread; state: %s' % (thread_num, thread_ptid[1], self.states[self.threads[thread_num].get_state()[0]]))
					except:
						traceback.print_exc()
				else:
					print('Thread %i (%i) is no OpenMP thread' % (thread_num, thread_ptid[1]))
	
	def enumerate_states(self):
		"""Helper function for list_threads: initializes map of OMPD states for output of
		'ompd threads'.
		"""
		if self.states is None:
			self.states = {}
			current = int("0x102", 0)
			count = 0
			more = 1
			
			while more > 0:
				tup = ompdModule.call_ompd_enumerate_states(self.addr_space, current)
				(next_state, next_state_name, more) = tup
				
				self.states[next_state] = next_state_name
				current = next_state
